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Zhuchengtyrannus, new Chinese tyrannosaurine



From: Ben Creisler
bh480@scn.org

New advance online paper in Cretaceous Research:


David W.E. Hone, Kebai Wang, Corwin Sullivan, Xijin Zhao, Shuqing Chen,
Dunjin Li, Shuan Ji, Qiang Ji and Xing Xu (2011)
A new tyrannosaurine theropod, Zhuchengtyrannus magnus is named based on a
maxilla and dentary.
Cretaceous Research (advance online publication)
doi:10.1016/j.cretres.2011.03.005

Abstract
Tyrannosaurids are primarily gigantic, predatory theropod dinosaurs of the
Cretaceous. Here we report a new member of the tyrannosaurid clade
Tyrannosaurinae from the Upper Cretaceous Wangshi Group of Zhucheng,
Shandong Province, China, based on a maxilla and associated dentary. The
discovery of this animal, here named Zhuchengtyrannus magnus gen. et sp.
nov., adds to the known diversity of tyrannosaurids in Asia. Z. magnus can
be identified by a horizontal shelf on the lateral surface of the base of
the ascending process, and a rounded notch in the anterior margin of the
maxillary fenestra. Several additional features contribute to a unique
combination of character states that serves to further distinguish Z.
magnus from other taxa. Comparisons with other tyrannosaurids suggest that
Zhuchengtyrannus was a very large theropod, comparable in size to both
Tarbosaurus and Tyrannosaurus.


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